JPH06128929A - Fishy hollow place by woodworking mattress - Google Patents

Abstract

PURPOSE:To arrange woodworking mattresses in the horizontal direction as a substitute of a checkdam of a river or a ground sill, to form a fishy hollow place in the rear of the woodworking mattresses and to enable fish to reach the upper part of the river across a weir. CONSTITUTION:Wooden levers 4 are mounted on two opposite sides around the upper surface of the concrete foundation 1, and then, wooden levers 4 opposed to the remaining two sides are intersected with the wooden levers 4 mentioned above to overlap, subsequently, they are piled up in the same way, and a reinforcing bar 3 erected on the upper surface of the concrete foundation 1 is inserted in the intersected part of the wooden levers 4 and is fixed to form wooden leverframes 6. One end of an inclined plate body 7 is fixed downward of the inside near to one side, and the other end is so fixed that it is projected from the upper surface of the approximate center of the wooden lever frames 6 and is arranged to the bottom floor of the river.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fish depression due to woodworking sedimentation, characterized in that, for example, woodworking sedimentation is arranged in a horizontal direction in place of river erosion control dams and head works.

[0002]

2. Description of the Related Art Sabo dams and heads have been installed in rapid rivers in conventional rivers to control the rapid flow of sand and the speed of flow. Fig. 5 shows the sabo dam and head drop construction.
As shown in FIG. 5, it is generally made of concrete, and the drop H thereof is usually 1.0 to 2.0 m.

[0003]

When the height of the erosion control dam and the drop work as described above is high, it is a very bad construction method for the fish, especially for small fish in the spawning season, because they cannot go upstream. . The water hits the sabo dam and the head drop quickly because the water falls off, and the water tapping part was made of flat concrete as shown in Fig. 5, and the depth could not be taken. Therefore, normally, a dam with a drop of about 40 cm can be easily crossed, but it is impossible to cross it because there are 1, 0 to 2 and 0 m of this sabo dam and drop work. However, the water spattered part is
As shown in, if it is not concrete but gravel or gravel and it is deep, the fish can run and jump and go over the weir, but there was a disadvantage that it was impossible because it was made of concrete. .

[0004]

Therefore, the present invention has been proposed in order to solve the above-mentioned inconvenience, and the construction thereof is such that wooden rods are mounted on two opposite sides of the upper surface of a concrete foundation. Then, the wooden rods are crossed over the wooden rods relative to the remaining two sides and overlapped with each other, and are piled up in the same manner. To secure the lower end of one of the slanted plates below one side of the wooden rod frame, and fix the other end so that it projects from the upper surface of the center of the wooden rod frame. It is arranged horizontally on the bottom floor of the river.

[0005]

Embodiments of the drawings will be described below. 1 is a concrete foundation, and 2 through holes 2 in the center
Two are provided. 3 are four corners of the upper surface of the concrete foundation 1 and, if necessary, reinforcing bars erected in the middle thereof. 4 is a wooden rod, the reinforcing bar 3 is inserted through the two opposing sides of the upper surface of the concrete foundation 1, and then the wooden rod 4 is inserted through the reinforcing bar 3 on the two opposing sides that are orthogonal to this. Then, the wooden rod frame 6 is constructed by alternately stacking them and sequentially stacking them, and screwing and fixing the nut 5 on the upper end of the reinforcing bar 3. Reference numeral 7 denotes an inclined plate body. For example, a plurality of wooden rods 4 are arranged side by side to form a plate body, and one end of the wooden rod frame 6 is fixed below one side of the wooden rod frame 6, and the other of the plate bodies 7 is fixed. The end is fixed so as to project from the upper surface of the center of the wooden rod frame 6. The woodworking floor constructed in this way is parallel to the bottom floor of the river. Reference numeral 8 denotes an upper plate which is attached to the upper part of the plate so as to cross it. Reference numeral 9 is a stone material such as natural stone or cobblestone, 10 is a small mountain, 11 is a depth (fuchi), and 12 is a connecting hook.

[0006]

Since the present invention has the above-mentioned structure, a large number of woodwork sediments are arranged in a row in the lateral direction of a riverbed such as a river and are connected by four connecting hooks 12 on the inclined plate 7. The stone material 9 such as natural stone and cobblestone on site is filled, and the woodworking floor remains hollow, or the natural stone and cobblestone are packed, and the through hole 2 at the bottom of the concrete foundation 1 is laid with cobblestone and gravel. To do.

[0007]

According to the present invention, the water tapping portion is dug due to the intense water force when the water level rises, and a part of the earth and sand is badly covered by the mountain 1
Deposit as 0. The small mountain 10 works like a weir to raise the water level on the good side, so that the depth of the pool can be increased, and at the same time, the head of the dam or the drop work can be reduced. Therefore, the fish can swim from an area slightly deeper than the surface of the water to a slanting upper position, and by its momentum, can cross the weir and reach the upstream. In this way, conventional hitting with shallow water just below the dam or head drop makes this run impossible, so fish could not run up even at a very low dam, but there was a depth 11 just below the woodworking floor. This makes it easy to go upstream. If the center of the sloping plate body 7 is not set to the same height but the center is lowered and the shore side is raised, the falling force can be made different from the center to the shore. A variety of fish can choose their favorite water pressure and go up. In conventional concrete sabo dams and head works, there was no place to evacuate fish during a flood, but in the case of the present invention, the interior of the wooden rod frame or the depth of its front becomes the evacuation site, and the bottom through hole The gaps between natural stones and cobblestones packed in 2 and 2 also serve as habitats and evacuation sites for small fish. Further, since these stuffed stone parts have high water permeability, they exert an effect that the lifting force and the buoyant force are not exerted on the structure of the wooden rod frame, and therefore the water flow is stabilized.

[Brief description of drawings]

FIG. 1 is a side view of the present invention,

FIG. 2 is a front view of a woodworking floor used in the present invention,

FIG. 3 is a plan view,

FIG. 4 is a side view,

FIG. 5 is a cross-sectional view of a conventional sabo dam,

FIG. 6 is a cross-sectional view illustrating a sabo dam.

[Explanation of code] 1 Concrete foundation 3 Reinforcing bar 4 Wooden rod 6 Wooden frame 7 Plate

Claims (1)

[Claims] The wooden rods 4 are placed on the two opposite sides of the upper surface of the concrete foundation 1, and then the wooden rods 4 are crossed over the wooden rods 4 in relation to the remaining two sides to be superposed and sequentially stacked. At the crossed portion of the wooden rod 4, a reinforcing bar 3 standing on the upper surface of the concrete foundation 1 is inserted and fixed to form a wooden rod frame 6, and a slanted plate body 7 is provided below one side of the wooden rod frame 6. Fix one end of
A fish depression by a woodworking floor characterized in that the other end of which is fixed so as to project from the substantially central upper surface of the wooden rod frame 6 is arranged in parallel with the bottom floor of the river.